Abstract: A fuel composition comprising a major amount of hydrocarbons boiling in the gasoline or diesel range and about 2,050 to about 10,000 parts per million by weight of a hydrocarbyl-substituted polyoxyalkylene amine having the formula: or a fuel-soluble salt thereof; wherein R is a hydrocarbyl group having from about 1 to about 30 carbon atoms; R1 and R2 are each independently hydrogen or lower alkyl having about 1 to about 6 carbon atoms and each R1 and R2 is independently selected in each —O—CHR1—CHR2— unit; A is amino, N-alkyl amino having about 1 to about 20 carbon atoms in the alkyl group, N,N-dialkyl amino having about 1 to about 20 carbon atoms in each alkyl group, or a polyamine moiety having about 2 to about 12 amine nitrogen atoms and about 2 to about 40 carbon atoms; and x is an integer from about 5 to about 100.